The main functioning of the banking system is to :

1. Financial Intermediation and the Role of Banks (basic)

Welcome to your first step in mastering banking! At its simplest, a bank is like a bridge. On one side, we have individuals and households who have extra money (Surplus Units) and want to keep it safe while earning a bit of interest. On the other side, we have entrepreneurs and individuals who need money to start a business or buy a home (Deficit Units). The bank stands in the middle, performing what we call Financial Intermediation.

Banks perform two primary, inseparable functions: accepting deposits and providing credit (loans). They mobilize savings from the public through various channels like savings accounts, current accounts, and fixed deposits Indian Economy, Nitin Singhania (ed 2nd 2021-22), Chapter 7, p.191. These funds aren't just kept in a vault; they are lent out to borrowers to fuel economic activity, a process known as credit creation Macroeconomics (NCERT class XII 2025 ed.), Chapter 3, p.38.

You might wonder: how do banks make money? This brings us to the concept of the Spread. Banks pay a certain interest rate to you (the Deposit Rate) and charge a higher interest rate to the person taking a loan (the Lending Rate) Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.92. The difference between these two rates is the bank's profit.

Feature	Deposit Rate	Lending Rate
Direction	Paid by the bank to the public.	Charged by the bank from the borrower.
Quantum	Generally lower.	Generally higher.

It is crucial to distinguish these core banking operations from government activities. While a bank might help you access a government scheme, the provision of subsidies is a fiscal function of the government, not a fundamental banking operation Macroeconomics (NCERT class XII 2025 ed.), Chapter 3, p.38. Commercial banks are essentially profit-seeking financial businesses that keep the wheels of the economy turning by moving money from where it is idle to where it is productive.

Sources: Macroeconomics (NCERT class XII 2025 ed.), Chapter 3: Money and Banking, p.38; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Chapter 7: Money and Banking, p.191; Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.92

2. Classification of Deposits: Demand vs. Time Liabilities (basic)

In the world of banking, the money you deposit is not an asset for the bank—it is a liability. This is because the bank is legally obligated to return that money to you. These liabilities are broadly classified into two categories based on when the bank is required to pay them back: Demand Liabilities and Time (or Term) Liabilities.

Demand Liabilities consist of funds that the bank must pay to the customer immediately upon request (or "on demand"). The most common examples are Current Accounts and Savings Accounts (often referred to as CASA). Because you can walk into a bank or use an ATM to withdraw this money at any moment, the bank must keep a portion of these funds highly liquid. On the other hand, Time Liabilities are deposits that are repayable only after a specific, pre-agreed period. These include Fixed Deposits (FDs) and Recurring Deposits (RDs), where the money is "locked in" for a tenure ranging from a few days to several years Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.53. While FDs can sometimes be withdrawn prematurely, they usually involve a penalty and an advance notice, reflecting their nature as long-term commitments Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.53.

When we add up all demand and time deposits held by the public (after adjusting for inter-bank balances), we get the Net Demand and Time Liabilities (NDTL). This figure is crucial because it serves as the baseline for calculating regulatory requirements like the Cash Reserve Ratio (CRR) and Statutory Liquidity Ratio (SLR) Indian Economy, Nitin Singhania (2nd ed. 2021-22), Money and Banking, p.168. Understanding this distinction is also vital for specialized banking models; for instance, Payments Banks are restricted to accepting only demand deposits and are prohibited from taking fixed or recurring deposits Indian Economy, Nitin Singhania (2nd ed. 2021-22), Money and Banking, p.191.

Feature	Demand Liabilities	Time Liabilities
Withdrawal	At any time, without prior notice.	After a fixed maturity period.
Examples	Savings Accounts, Current Accounts.	Fixed Deposits (FD), Recurring Deposits (RD).
Interest Rate	Generally lower (or zero for current accounts).	Generally higher, as the bank can use the money for longer.

Sources: Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.53, 63; Indian Economy, Nitin Singhania (2nd ed. 2021-22), Money and Banking, p.168, 191

3. Primary vs. Secondary Functions of Commercial Banks (basic)

To understand a Commercial Bank, we must first look at its core purpose: acting as a financial bridge. At its simplest level, a bank is an institution that deals in money by mobilizing savings from those who have extra (surplus) and channeling them to those who need it (deficit). These activities are categorized into Primary and Secondary functions. As noted in historical contexts, even the early Presidency banks were established to perform these "normal functions" that we see today Indian Economy, Vivek Singh (7th ed.), Money and Banking - Part II, p.125.

Primary Functions are the "bread and butter" of banking. They consist of two fundamental activities:

• Accepting Deposits: Banks collect money through various accounts like Savings Accounts, Current Accounts, and Fixed Deposits (FDs). This is how they mobilize public savings Macroeconomics (NCERT class XII 2025 ed.), Money and Banking, p.50.
• Advancing Loans: The bank doesn't just sit on the cash; it lends it out to businesses and individuals as credit. The interest rate the bank charges borrowers is higher than the interest it pays to depositors. This difference is called the 'Spread', and it represents the bank's primary profit.

By performing these two roles, banks engage in Credit Creation, effectively increasing the money supply in the economy.

Secondary Functions are supplementary services that make a bank a "one-stop shop" for financial needs. These are often divided into Agency Functions (where the bank acts as your agent, like paying your insurance premiums or collecting checks) and General Utility Functions (like providing safe deposit lockers, issuing traveler's checks, or underwriting securities). While entities like Primary Dealers focus specifically on government securities markets Indian Economy, Nitin Singhania (2nd ed.), Money and Banking, p.188, a standard commercial bank offers a broader suite of these utility services to the general public.

Feature	Primary Functions	Secondary Functions
Core Objective	Financial Intermediation (Accepting & Lending)	Customer Service & Value Addition
Examples	Current accounts, Overdrafts, Term loans	Locker facilities, Letter of Credit, Bill payments
Economic Impact	Directly affects Money Supply/Credit Creation	Facilitates ease of commerce

Sources: Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking - Part II, p.125; Macroeconomics (NCERT class XII 2025 ed.), Money and Banking, p.50; Indian Economy, Nitin Singhania (2nd ed. 2021-22), Money and Banking, p.188

4. The Mechanism of Credit Creation (intermediate)

When you deposit ₹10,000 in a bank, the bank doesn't just keep it in a vault waiting for you. Instead, it uses that money to fuel the economy through a fascinating process called Credit Creation. At its heart, the commercial banking system acts as a bridge between depositors (who have surplus funds) and borrowers (who need funds for investment or consumption) Understanding Economic Development. Class X . NCERT(Revised ed 2025), MONEY AND CREDIT, p.51. This isn't just moving money around; it actually expands the total money supply in the economy.

The mechanism works on a circular logic. Suppose you deposit ₹1,000 (a Primary Deposit). The bank knows that all depositors won't withdraw their money at the exact same time. However, they cannot lend all of it out because the Reserve Bank of India (RBI) mandates that a certain percentage must be kept as reserves to ensure liquidity Macroeconomics (NCERT class XII 2025 ed.), Chapter 3, p.40. If the reserve requirement is 10%, the bank keeps ₹100 and lends ₹900 to a borrower. This ₹900 typically ends up being spent and then deposited back into the banking system, becoming a new deposit for another bank to lend against. This cycle repeats, creating "new" money in the form of digital credit at each step.

How do banks profit from this? They charge a higher interest rate on the loans they give out than the interest they pay to you on your savings. This difference is known as the 'Spread', and it constitutes the primary source of income for commercial banks Macroeconomics (NCERT class XII 2025 ed.), Chapter 3, p.38. The ability of the banking system to multiply an initial deposit into a much larger total amount of credit is measured by the Money Multiplier, which is the ratio of Broad Money (M₃) to Reserve Money (M₀) Indian Economy, Nitin Singhania (ed 2nd 2021-22), Chapter 7, p.159.

Step	Action	Effect on Money Supply
1. Primary Deposit	Cash deposited by a customer.	Initial base.
2. Required Reserves	Bank sets aside a % mandated by RBI.	Limits credit expansion.
3. Derivative Deposit	Bank lends the remaining 'Excess Reserves'.	Increases total money supply.

Sources: Understanding Economic Development. Class X . NCERT(Revised ed 2025), MONEY AND CREDIT, p.51; Macroeconomics (NCERT class XII 2025 ed.), Chapter 3: Money and Banking, p.38, 40; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Chapter 7: Money and Banking, p.159

5. Banks vs. NBFCs: Functional Differences (intermediate)

To understand the difference between Banks and Non-Banking Financial Companies (NBFCs), we must first look at their core identity. Both are financial intermediaries—they take money from those who have extra and lend it to those who need it. However, while a bank is like a "financial supermarket" that manages the country's money flow, an NBFC is more like a "specialized credit shop."

The most fundamental functional difference lies in Demand Deposits. Banks are allowed to accept deposits that you can withdraw at any time without notice (like Savings and Current accounts). Because these deposits are "on-demand," banks can issue cheques against them, making them a central part of the nation's payment and settlement system. In contrast, NBFCs are strictly prohibited from accepting demand deposits; they generally rely on term deposits (money locked in for a specific time) or market borrowing to fund their operations Nitin Singhania, Money and Banking, p.187. This means you cannot walk into a typical NBFC and open a daily-use savings account or use an NBFC-issued cheque to pay your bills Vivek Singh, Money and Banking- Part I, p.52.

Safety and regulation also set them apart. Banks are subject to rigorous Reserve Ratios like the Cash Reserve Ratio (CRR) and Statutory Liquidity Ratio (SLR), which act as a safety net but also limit how much they can lend. NBFCs, while regulated by the RBI, are not required to maintain these specific reserve ratios Nitin Singhania, Money and Banking, p.187. Furthermore, if a bank fails, your deposits are insured up to ₹5 lakh by the DICGC. No such insurance facility exists for those who park their money in NBFCs Nitin Singhania, Money and Banking, p.187.

Feature	Commercial Banks	NBFCs
Demand Deposits	Accepted (Current/Savings)	Strictly Prohibited
Cheque Facility	Can issue cheques on itself	Cannot issue cheques
Deposit Insurance	Available (via DICGC)	Not Available
Reserve Ratios	Must maintain CRR & SLR	Not required to maintain

Interestingly, the regulatory gap is narrowing. Since July 2019, the RBI Act was amended to give the RBI power to supersede the Board of an NBFC in case of mismanagement, a power it previously held only over banks Vivek Singh, Money and Banking- Part I, p.67. This shift acknowledges that large NBFCs are now "systemically important" to the Indian economy.

Sources: Indian Economy, Nitin Singhania, Money and Banking, p.187; Indian Economy, Vivek Singh, Money and Banking- Part I, p.52, 67

6. The Role of the Central Bank (RBI) vs. Commercial Banks (intermediate)

To understand the banking sector, we must distinguish between the players (Commercial Banks) and the referee (The Reserve Bank of India). Commercial banks function as financial intermediaries. Their primary job is to mobilize savings from the public through various accounts—like savings, current, and fixed deposits—and channel those funds toward productive investments via loans. This process is known as credit creation Macroeconomics (NCERT class XII 2025 ed.), Chapter 3: Money and Banking, p. 38. These banks operate on a profit motive; they earn a 'spread', which is the difference between the higher interest rate they charge borrowers and the lower interest rate they pay to depositors.

In contrast, the Reserve Bank of India (RBI) does not seek profit from the public. Its objective is to maintain monetary stability and ensure the economy runs smoothly. As the regulator, the RBI derives its authority from the RBI Act, 1934 and the Banking Regulation Act, 1949 Indian Economy, Vivek Singh (7th ed.), Money and Banking- Part I, p. 66. While commercial banks focus on individual transactions and collateral-backed lending Understanding Economic Development (Class X NCERT), Money and Credit, p. 43, the RBI focuses on the big picture: controlling inflation, managing currency, and supervising the health of all financial institutions to prevent systemic failures.

One of the most critical interactions between the two is the RBI’s role as the 'Lender of Last Resort.' If a commercial bank faces a sudden crisis or a "bank run" where everyone tries to withdraw money at once, the RBI steps in to provide liquidity and ensure solvency Indian Economy, Vivek Singh (7th ed.), Money and Banking- Part I, p. 69. This guarantee maintains public trust in the entire banking system. Furthermore, for certain sectors like Cooperative Banks, there is a 'duality of control' where the RBI handles banking functions while the State or Central government handles administrative aspects like registration and management Indian Economy, Vivek Singh (7th ed.), Money and Banking- Part I, p. 82.

Feature	Commercial Banks	Central Bank (RBI)
Primary Goal	Profit maximization and public service.	Financial stability and price control.
Public Dealing	Directly accepts deposits and gives loans.	Acts as the "Banker to Banks"; no direct public dealing.
Money Power	Creates credit based on deposits.	Issues currency and controls total money supply.

Sources: Macroeconomics (NCERT class XII 2025 ed.), Chapter 3: Money and Banking, p.38; Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.65-66, 69, 82; Understanding Economic Development, Class X NCERT, Money and Credit, p.43

7. Distinguishing Banking Operations from Fiscal Policy (exam-level)

To understand the economy, we must distinguish between the commercial engine (Banking) and the sovereign steering wheel (Fiscal Policy). At its heart, the banking system acts as a financial intermediary. Its primary job is to mobilize savings by accepting deposits—like savings and fixed accounts—and then deploying those funds as credit or loans to borrowers Indian Economy, Nitin Singhania, Money and Banking, p. 191. Banks earn their bread through the 'spread', which is the difference between the interest they pay to you (the depositor) and the interest they charge a business (the borrower). This process of 'credit creation' is a market-driven, commercial operation aimed at maintaining liquidity and generating profit.

Fiscal Policy, on the other hand, is the domain of the Government, not banks. It refers to how the state adjusts its spending levels and tax rates to influence the nation's economy Indian Economy, Vivek Singh, Government Budgeting, p. 154. While a bank manages your private money, the government manages 'public finance.' If the government spends more than it earns, it runs a fiscal deficit, which indicates its total borrowing requirements Indian Economy, Nitin Singhania, Indian Tax Structure and Public Finance, p. 110. While banks are often the conduits for government money (like keeping your Jan Dhan account), the actual decision to give a subsidy is a fiscal choice, not a banking operation.

The distinction becomes clearest when we look at Subsidies. A bank might offer you an 'overdraft' (a loan), but it will never give you a 'subsidy' from its own pockets. Subsidies, such as those for food or fertilizers, are social safety nets funded by the government's resources to help the poor Indian Economy, Vivek Singh, Subsidies, p. 284. Therefore, banking is about intermediation and interest, while fiscal policy is about taxation, spending, and social welfare.

Feature	Banking Operations	Fiscal Policy
Primary Actor	Commercial Banks / RBI	Central/State Governments
Core Activity	Accepting deposits & lending	Taxation & Public Spending
Goal	Profit (Spread) & Liquidity	Economic Growth & Welfare
Key Tool	Interest Rates / Credit	Subsidies / Budgets

Sources: Indian Economy, Nitin Singhania, Money and Banking, p.191; Indian Economy, Vivek Singh, Government Budgeting, p.154; Indian Economy, Nitin Singhania, Indian Tax Structure and Public Finance, p.110; Indian Economy, Vivek Singh, Subsidies, p.284

8. Solving the Original PYQ (exam-level)

Now that you have mastered the building blocks of Financial Intermediation, this question invites you to identify the core identity of a bank. As we discussed in your learning modules, the banking system acts as a vital bridge between surplus units (savers) and deficit units (borrowers). According to Macroeconomics (NCERT class XII 2025 ed.), the term "main functioning" refers to the primary economic role that defines a bank's existence. By mobilizing savings through various accounts and deploying those funds into the economy, banks facilitate the essential process of credit creation, which drives national growth.

To arrive at the correct answer, think about the bank's survival mechanism. A bank generates profit through the spread—the difference between the interest paid to depositors and the interest charged to borrowers. This necessitates a two-way flow: first, the bank must accept deposits to build its capital base, and second, it must provide credit to generate income. This makes (A) accept deposits and provide credit the only logical choice that captures the fundamental dual nature of commercial banking. Without either of these pillars, the traditional banking model would cease to function.

UPSC frequently uses "distractor" terms to test your conceptual clarity, and in this case, the trap is the word subsidies. While modern banks often act as intermediaries for government schemes like Direct Benefit Transfer (DBT), providing subsidies is a fiscal function of the government, not a core banking activity. As noted in Indian Economy, Nitin Singhania (ed 2nd 2021-22), confusing a bank's agency functions (like distributing welfare) with its primary functions is a common mistake. Options B, C, and D are incorrect because they incorporate this government welfare role into the definition of basic banking operations.